Gigantic clean-room under vacuum you don’t have to expend energy to maintain! As you say, it has immense potential. Temperature fluctuations between dark and Il

Gigantic clean-room under vacuum you don’t have to expend energy to maintain! As you say, it has immense potential. Temperature fluctuations between dark and Illuminatated by sunlight is one challenge, but also a potential feature. Heat dissipation is another challenge, but could also be a feature.